Best Laravel Interview Questions and Answer Preparation Resources

Laravel is created by Taylor Otwell for devoloping robust and secure web applications and apis. It one of the most popular PHP framework which is based on MVC architecture. If you are looking for laravel resources to crack an interview on Laravel then you can visit on following links.

So you are looking for a Laravel Interview Questions For 4 year Experience. In this post, I am going to share interview questions on Laravel frameworks for experienced developers. Developer who have 3,4,5 years of experience in Laravel.

You have read many interview questions on Laravel frameworks but have you read this? This website can collections of 40 best Laravel interview questions that are asked by a Senior Laravel developer. These questions are curated from top questioning and answering websites quora, StackOverflow, Github, and Glassdoor and answered by technology Experts.

Laravel a framework for developers who want to code in PHP using the latest coding trends and want to give their best in the web development industry using MVC. Laravel is collections of Symfony best component and made a complete framework. These Laravel interview questions give you basic to intermediate understanding of Laravel so you can face and answer Laravel interview questions.

In the last few years medium become a hub for developer and programmer where they write technical interview questions and tutorials on latest frameworks, programming languages and tools. In this link, you will found some Laravel questions that are good to read before appearing an interview on Laravel whether you are a freelancer or senior developers. Laravel framework is gaining popularity day by day and in the last 3 years, it is ruling above all PHP frameworks due to its features like Hashed Tokens, Automatic Policy Resolution, Artisan tool, Eloquent ORM, Unit-Testing, support to many databases and much more.

At Quora, you can find the Common Laravel interview questions that asked by an interviewer in Laravel interviews. Here many developers and bloggers share experience about their Laravel interview and so it becomes the best resource for developers to read questions who have lined interviews on Laravel. Here read about frequently asked questions on laravel topics like dependency injection, Migration, artisan commands, soft deletes, service repository, event and listeners in Laravel, eager loading, database relations and many more...

Luke Evers had written a compiled list of 10 Laravel interview questions and answers on Github for Laravel developers these questions are categorized into 4 levels General Laravel Questions, Technical Laravel Questions, Intermediate Level Laravel Questions which test the capabilities for Laravel developer. Read these questions to stand out from queue and to sharpen your Laravel skills.

Laravel is a PHP based web-framework for building high-end web applications using its significant and graceful syntaxes. It comes with a strong collection of tools and provides application architecture. Moreover, it includes various characteristics of technologies like ASP.NET MVC, CodeIgniter, Ruby on Rails and lot more. This framework is open source framework. Along with that security of the application is also Laravel take care of.

Here are some of the best features of PHP Laravel Framework which makes it popular among developers and businesses.

Template Engine: Laravel framework is highly acknowledged for its built-in lightweight templates which can be used to create wonderful layouts using dynamic content seeding. In addition to this, it provides multiple widgets incorporating CSS and JS code with robust structures. Laravel templates are innovatively designed to create simple as well as complex layouts with distinctive sections.

MVC Architecture Support: Laravel supports MVC architecture pattern which ensures separates business logic and presentation layers. MVC pattern of Laravel has a lot of built-in functions, improves application performance and increases security as well as scalability.

Security: Laravel framework offers very strong web application security. It uses hashed and salted password mechanisms so the password would never be saved as plain text in the database. It also uses the “Bcrypt Hashing Algorithm” for generating an encrypted password. Additionally, this PHP web development framework uses prepared SQL statements that prevent SQL injection attacks.

Artisan: Laravel framework offers a built-in command-line tool called Artisan which helps to automate the majority of tedious repetitive programming tasks. These artisans can also be utilized to create the database structure, a skeleton code, and manage migration so it is a pretty easy-to-manage database system.

Libraries & Modular: Laravel comes with pre-installed Object-Oriented and Modular libraries which are not available in many other PHP frameworks. For example, an Authentication library which is easy-to-implement and has features such as checking active users, Bcrypt hashing, password reset, CSRF (Cross-site Request Forgery) protection, and encryption. Furthermore, this framework is divided into individual modules adopting modern PHP principles facilitating responsive and modular web application development.

Database Migration System: Laravel migration system helps to expand the web application database structure without re-creating every time when there is a change in the code.

Because of this feature, the risk of losing data is very minimal. It not only offers the facility to change the database structure but also helps to do using PHP code instead of SQL.

The Laravel framework has a few system requirements. All of these requirements are satisfied by the Laravel Homestead virtual machine, so it's highly recommended that you use Homestead as your local Laravel development environment.

However, if you are not using Homestead, you will need to make sure your server meets the following requirements:

There is no framework that is perfect. Every framework has its own Pros and Cons. And you can do anything in any of the modern frameworks.

Every framework provides some alternatives for its cons or some more pros along with some more cons.

If you are a PHP lover then Laravel is the best framework for you with the latest technologies.

Laravel Pros:

Easy to learn: Although its documents are already simplest. The Best Laravel and PHP Screencasts makes it more convenient. Its documentation is also very beautiful.

It is an MVC framework: It avoids silly traditional architecture where developers used to write all HTML and PHP code in the same file.

Eloquent ORM support: Another service provided to abstract and automate the model part. Relationships and mapping of the database with our application with a simple convention over configuration technique.

Template: Blade template engine gives an easy experience in adding logic in the HTML file. So easy to add new features without hacking the core.

Routing: The easiest to manage and abstract way of routing. It just makes everything hassle-free and the abstraction provided takes out each and every complexity. It also including reverse routing.

Queue management: To abstract the unnecessary tasks and get them queued behind the scenes and make user response time much faster.

In-house support for Redis. It can also be extended to Memcached.

Dependency Injection: Easy testing and automating dependency loading.

Artisan: Making command-line apps in a moment.

Laravel Cons:

Less inbuilt support: It is lightweight so it has less inbuilt support in comparison to Django and Rails. But this problem can be solved by integrating third-party tools, but for large and very custom websites it may be a tedious task.

Some classes are bit trickier: Laravel’s Core files are all within (at least) the Laravel namespace and not all of the files in core use a namespace slash ( a \ ) in front of a call to another core file, which makes extending some classes a bit trickier. This is not a huge issue and one, not every developer will need to worry about.

Composer is an application-level package manager for the PHP programming language that provides a standard format for managing dependencies of PHP software and required libraries. It was developed by Nils Adermann and Jordi Boggiano, who continue to manage the project.

Lumen is a new project from Laravel creator Taylor Otwell. It's a "micro-framework", meaning it's a smaller, faster, leaner version of a full web application framework. PHP has two other popular micro-frameworks, Slim and Silex. Lumen has the same foundation as Laravel and many of the same components. But Lumen is built for microservices, not so much for user-facing applications (although it can be used for anything).

What’s it for?

Lumen is for projects and components that can benefit from the convenience and power of Laravel but can afford to sacrifice some configurability and flexibility in exchange for a speed boost.

A Laravel facade is a class which provides a static-like interface to services inside the container. These facades, according to the documentation, serve as a proxy for accessing the underlying implementation of the container's services.

Bundles are the heart of the improvements that were made in Laravel 3.0. They are a simple way to group code into convenient "bundles". A bundle can have it's own views, configuration, routes, migrations, tasks, and more.

A bundle could be everything from a database ORM to a robust authentication system.

Laravel Reverse routing is the process of generating the URL based on name or symbol. It generates URL's based on route declarations. Reverse routing makes your application so much more flexible and helps the developer to write cleaner code in View. It defines a relationship between links and Laravel routes.

Traits are a mechanism for code reuse in single inheritance languages such as PHP. A Trait is intended to reduce some limitations of single inheritance by enabling a developer to reuse sets of methods freely in several independent classes living in different class hierarchies.

Dusk: Laravel Dusk provides an expressive, easy-to-use browser automation and testing API. By default, Dusk does not require you to install JDK or Selenium on your machine.

Envoy: Laravel Envoy provides a clean, minimal syntax for defining common tasks you run on your remote servers. Using Blade style syntax, you can easily setup tasks for deployment, Artisan commands, and more. Currently, Envoy only supports the Mac and Linux operating systems.

Passport: Laravel makes API authentication a breeze using Laravel Passport, which provides a full OAuth2 server implementation for your Laravel application in a matter of minutes. Passport is built on top of the League OAuth2 server that is maintained by Alex Bilbie.

Laravel provides an expressive, unified API for various caching backends. The cache configuration is located at config/cache.php. In this file you may specify which cache driver you would like to be used by default throughout your application. Laravel supports popular caching backends like Memcached and Redis out of the box.

Laravel includes a middleware that verifies the user of your application is authenticated. If the user is not authenticated, the middleware will redirect the user to the login screen. However, if the user is authenticated, the middleware will allow the request to proceed further into the application.

Additional middleware can be written to perform a variety of tasks besides authentication. A CORS middleware might be responsible for adding the proper headers to all responses leaving your application. A logging middleware might log all incoming requests to your application.

In software engineering, inversion of control is a programming principle. IOC inverts the flow of control as compared to traditional control flow. In IOC, custom-written portions of a computer program receives the flow of control from a generic framework. A software architecture with this design inverts control as compared to traditional procedural programming: in traditional programming, the custom code that expresses the purpose of the program calls into reusable libraries to take care of generic tasks, but with inversion of control, it is the framework that calls into the custom, or task-specific, code.

A blog post may have many comments, or an order could be related to the user who placed it. Eloquent makes managing and working with these relationships easy, and supports several different types of relationships:

The database query builder provides a convenient, fluent interface to creating and running database queries. It can be used to perform most database operations in your application, and works on all supported database systems.

By using Ajax() method in Laravel, you can check request is ajax or not.

Laravel Request class has many methods to read HTTP requests for the current request. You can also check if the request is over https or request has JSON content type. You can use directly Request facade that grants you access to the current request or you can use an instance of Request Class.

In software engineering, dependency injection is a technique whereby one object (or static method) supplies the dependencies of another object. A dependency is an object that can be used (a service).

There are basically three types of dependency injection:

Constructor injection: the dependencies are provided through a class constructor.

Setter injection: the client exposes a setter method that the injector uses to inject the dependency.

Interface injection: the dependency provides an injector method that will inject the dependency into any client passed to it. Clients must implement an interface that exposes a setter method that accepts the dependency.

Laravel includes a middleware that verifies the user of your application is authenticated. If the user is not authenticated, the middleware will redirect the user to the login screen. However, if the user is authenticated, the middleware will allow the request to proceed further into the application.

There are two ways to enable & disable maintenance mode in Laravel 5. Whenever your website is in maintenance mode, laravel returns a custom view that will be displayed for all requests. This makes it easy to "disable" your website or application while it is updating or when you are performing some maintenance.

Service providers are the central place of all Laravel application bootstrapping. Your own application, as well as all of Laravel's core services, are bootstrapped via services providers.

But, what do we mean by "bootstrapped"?

In general, we mean registering things, including registering service container bindings, event listeners, middleware, and even routes. Service providers are the central place to configure your application.

PHP helper functions that are used by Laravel are designed to speed up and homogenize repetitive tasks, and make your life that much easier. Laravel includes a variety of global "helper" PHP functions. Many of these functions are used by the framework itself; however, you are free to use them in your own applications if you find them convenient.

Artisan is the name of the command-line interface included with Laravel. It provides a number of helpful commands for your use while developing your application. It is driven by the powerful Symfony Console component.

Some of the artisan commands:

Listing All Available Commands

To view a list of all available Artisan commands, you may use the list command:

Command:

Php artisan list

Viewing The Help Screen For A Command

Every command also includes a "help" screen which displays and describes the command's available arguments and options. To view a help screen, simply precede the name of the command with help:

Command:

php artisan help

Specifying The Configuration Environment

You may specify the configuration environment that should be used while running a command using the --env switch:

Whenever you perform an INSERT or UPDATE on a database table with an AUTO_INCREMENT column then you get the last insert id of last insert or update query. In PHP, you can use mysqli_insert_id to get the last inserted record id.

In laravel, when you go with DB query builder then you can use insertGetId() that will insert a record and then return last inserted record id.

If you are inserting a record using Laravel Eloquent then you don't need to use insertGetId() function to get last inserted id. You can simply use a create a method to insert a new record into. The inserted model instance will be returned to you from the method.

Cookies:- A computer cookie is a small piece of data sent from a website and stored on the user's computer by the user's web browser while the user is browsing.

Create Cookies:- Cookie can be created by a global cookie helper of Laravel. It is an instance of Symfony\Component\HttpFoundation\Cookie. The cookie can be attached to the response using the cookie() method. Create a response instance of Illuminate\Http\Response class to call the with cookie() method. The cookie generated by the Laravel is encrypted and signed and it can’t be modified or read by the client.

Cookie() method will take 3 arguments. The first argument is the name of the cookie, the second argument is the value of the cookie and the third argument is the duration of the cookie after which the cookie will get deleted automatically.

A cookie can be set forever by using the forever method as shown in the below code.

Authentication is the process of identifying user credentials. In web applications, authentication is managed by sessions that take the input parameters such as email or username and password, for user identification. If these parameters match, the user is said to be authenticated.

Laravel uses the following command to create forms and the associated controllers to perform authentication −

php artisan make:auth

The controller which is used for the authentication process is Auth\AuthController.

Attribute casting:- Casting a value means changing it to (or ensuring it is already) a particular type. Some types you might be familiar with are integer or boolean. Attribute casting is a feature of Eloquent models that allows you to set your model to automatically cast a particular attribute on your Eloquent model to a certain type.

Note:- You could do this in the past, but you would have to automatically define a mutator for each attribute; now you can do it automatically with a single configuration array.

That means if you store your data in a particular format in the database, and you want it to return in a different format, you can now cast it to the new format.

How does it work?

You cast attributes in Eloquent by adding a protected $casts array to your model.

As you can see, each entry in the array has the property slug as the key and the cast type as the value. This $casts array is telling Eloquent: “Every time I access a property on this model named is_admin, please return it cast to type boolean.

Pusher is a hosted service that makes it super-easy to add real-time data and functionality to web and mobile applications. Pusher sits as a real-time layer between your servers and your clients. Pusher maintains persistent connections to the clients - over WebSocket if possible and falling back to HTTP-based connectivity - so that as soon as your servers have new data that they want to push to the clients they can do, instantly via Pusher.

Pusher offers libraries to integrate into all the main runtimes and frameworks. PHP, Ruby, Python, Java, .NET, Go and Node on the server and JavaScript, Objective-C (iOS) and Java (Android) on the client.

Deleting will remove the records in the database. To delete a model, call the delete method on a model instance:

$flight = App\Flight::find(1);$flight->delete();

Soft Deleting:- In addition to actually removing records from the database, Eloquent can also "soft delete" models. When models are soft deleted, they are not actually removed from the database. Instead, a deleted_at attribute is set on the model and inserted into the database.

Laravel artisan's tinker is a repl (read-eval-print loop). A repl translates to a read-eval-print-loop, and it is an interactive language shell. It takes in single user input, evaluates it, and returns the result to the user.

Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple's macOS operating system and Linux. The name is intended to suggest the idea of building software on the Mac depending on the user's taste.

Laravel's events provide a simple observer implementation, allowing you to subscribe and listen for various events that occur in your application. Event classes are typically stored in the app/Events directory, while their listeners are stored in app/Listeners. Don't worry if you don't see these directories in your application since they will be created for you as you generate events and listeners using Artisan console commands.

Laravel Homestead is an official, pre-packaged Vagrant box that provides you a wonderful development environment without requiring you to install PHP, a web server, and any other server software on your local machine. No more worrying about messing up your operating system! Vagrant boxes are completely disposable. If something goes wrong, you can destroy and re-create the box in minutes!

PHP file included with Laravel, you will see a provider's array. These are all of the service provider classes that will be loaded for your application. Of course, many of these are "deferred" providers, meaning they will not be loaded on every request, but only when the services they provide are actually needed.

Whenever you are unsure, you can have a look at Laravel's API documentation with the source code. The Redirector class defines a status= 302 as a default value. You can define the status code with the to() method:

Macros are a way to reduce the lines of code a developer has to write and can be traditionally thought of as "shortcuts". Laravel generally uses macros to add, or inject, functionality into various classes at runtime.

Eager Loading helps you to load all your needed entities at once;i.e., all your child entities will be loaded at a single database call. This can be achieved, using the Include method, which returns the related entities as a part of the query and a large amount of data is loaded at once.

The cursor method allows you to iterate through your database records using a cursor, which will only execute a single query. When processing large amounts of data, the cursor method may be used to greatly reduce your memory usage.